âŠ5,231 feet (1,594 metres) at Sanyasimalai (Duffâs Hill) on the Yercaud plateau. Widespread bauxite deposits are the basis for aluminum-processing plants at Mettur and Yercaud. Coffee is extensively grown on the plateau. In 1845 the British established a hill station at Yercaud, which is now a resort and educational centre.
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